Means for securing hypodermic-needle mounts



July 6 1926. 1,591,761

G. E. HAlNES MEANS FOR SECURING HYPm Em-nc NEEDLE MOUNTS Filed March 26,1926 Patented Ja e, was.

GEORGE E. names, or WATERTOWN, NEW YORK, AssIenoa T FAICHNEY INSTRU-IVIENT CORPORATION, or WATERTOWN, new YORK, .A coaroganrron or new YORK.

MEANS FOR SECURING HYPODERMIC-NEEDLE MOUNTS.

Application filed March 26, 1926. Serial No. 97,736.

This invention relates to means for securing needle-mounts to syringes,designed particularly for use in connection with hypodermic and other"hollow needles of the type known as slip-on needles.

The object of the invention is to provide novel, simple, quick-actingand positive fa."- tening means, by which the needle-mount may bedetachably secured to the tip or male slip with which certain well-knowntypes of hypodermic syringes are equipped. A further object is toprovide a novel adaptor or slip, which is formed at one end with asocket, in which the barrel of the syringe may be permanently seated,the opposite end of the adapter comprising a coneshaped prolate, whichtelescopes and con forms to the correspondingly tapered body of theneedle-mount, and effects the pressure or liquid seal required forsyringes of the class; the said adapter being provided medially withcircumferential cam-portions which effect the locking of the needlemountin the operative position. A further object is to provide a sleeve orcoupling which is rotatably supported by the adapter, the said couplingbeing arranged to interlock with the needle-mount, and being equippedwith a plurality of rockable dogs or grips, which are normally incontact with and are actu ated by the cam-portions of the adapter, thesaid dogs being arranged to simultaneously grip the needle-mount forpreventing accidental loosening of the pressure tight joint or releaseof the needle-mount from the adapter, by the partial rotation of themount and the said coupling. And a further object is to provide asyringe of the hypodermic type wherein all of the detachable parts maybe assembled pressure-tight, and wherein the needle and its mounting maybe positively locked to the prolate cone of the adapter, without dangerof the needle and its mount becoming detached, especially when thesyringe is being used in the mouth or throat of a patient.

The Various features and parts of the invention will be understood fromthe detailed description which follows, and by reference to theaccompanying drawing, in which Figure 1 is a side elevation of one typeof hypodermic syringe, to which my improvement may be applied; showingthe needle-mount securely locked to the adapter.

Fig. 2 is a longitudinal section, taken on llne 2-2 of Fig. 1. Fig. 3 isa rear end View of the adapter. Fig. 4 is a side elevation of the same.Fig. 5 is a front end view of the adapter. Fig. 6 is respectively a sideand a front end elevation of the annular coupling. Fig. 7 1s a rear endand a side view of the needle-mount. Fig. 8 is a broken side elevationof the adapter and needle-mount showing the dogs engaging grooves of themount and Fig. 9 is a rear end elevation of the needle-mount.

In the drawing, 2 represents the barrel of the syrmge, having its headend fitted with and partially closed by a ferrule 3, the latter beingprovided with finger loops 3, which are rigid to its opposite sides. 4:represents the plunger, by means of which the barrel may be filled andemptied, the said plunger being mounted upon a stem l, which plays in aconcentric opening in the ferrule, and its outer end being fitted withthe usual thumb loop 4:. The opposite end of the barrel is usuallytapered, as at 2 and telescopes an adapter 5, the latter having a socket5, for snugly receiving the barrel, and to which the barrel may berigidly secured by solder or cement. The free end of the adaptercomprises a tapered portion 5, which is formed with a relatively largebore 5", that communicates with the interior of the barrel 2. At thebase of the conical prolate 5 the adapter is formed with a cylindricalportion 5 having a circumferential groove 5 and adjacent the saidcylindrical portion the body 5 is formed with an annular flange 5, thelatter having its opposite sides correspondingly grooved or depressedlongitudinally for providing similar cam portions 5. 6 represents anordinary hollow hypodermic needle, which is supported by a mount orholder 7, the latter being bored out axially, as at 7' to receive theneedle. Beyond the needle bore, the mount 7 is formed with a taperedsocket 7 the taper thereof, preferably corresponding exactly to thetaper of the slip 5 and the inner end of the mount 7 is shown formedwith a flange 7 the said flange being preferably cut away or flattenedat the opposite sides of the mount, as shown in the end view of Fig. 7.8 represents an annular sleevecoupling, or collar which is bored out tooperativel fit the cylindrical portion 5, the said coupling being formedat one end with a transverse recess 0r socket 8', which is adapted toreceive the flange-end 7" of the needle-mount, as shown in Fig. 2. Bythis construction and arrangement, the mount 7 and the coupling 8 may berotated on the adapter as one part, and by reason of the interlocking ofthe said parts neither may be rotated independently of the other. Thecoupling 8 is held from accidental detachment from the part 5, and yetis allowed free rotary movement thereon, by means of a pin S which playsin the groove 5. The coupling 8 is formed with oppositely facing,longitudinal grooves 8 in which are disposed similar dogs or grippers 9,as best seen in Figs. 1 and 6, the said dogs being pivotally held inplace by pins 9. The opposite ends of the dogs 9 project beyond the endsof the coupling 8, the ends 9 of the dogs being normally in engagementwith the flange 5", and adapted when the mount 7 is being applied to orremoved from the adapter, to lie loosely in the cam-grooves 5. The otherends of the dogs are inclined towards each other, and comprise hooks orteeth 9 which are arranged to engage the opposite sides of the body ofthe needle mount, as shown in Fig. 1. To apply the needle-n1ount to theadapter 5 and the coupling 8, the latter is preferably first rotated forpositioning the dogs 9 in the camgrooves 5. This allows their hook-ends9 to be spread apart sufficiently to permit the mount 7 to be slippedover the cone 5, and its flange-end to be entered into the socket 8, asshown in Fig. 2. The rigid or positive fastening of the needle-mount 7may then be efi'ected by the partial rotation of the mount and thecoupling 8, in either direction, for shifting ends 9 of the dogs out or"the camgrooves 5, as shown in Fig. 1. This partial rotation of thecoupling 8 ettects the spreading of the ends 9 of the dogs, andcorrespondingly moves the hooks 9 into gripping engagement with theneedle-mount 7 (see Fig. 1).

In all hypodermic syringes. it is highly important that the needles andtheir mounts, as 7, be securely fastened to the syringe proper, in orderthat there may be no possibility of the needle becoming accidentallydetached while the syringe is being used. It is equally important thatthe several parts he so constructed and arranged that when they areassembled (see Figs. 1 and 2). all danger of the liquid or othercontents of the syringe escaping at the joints is obviated.

Obviously, some changes may be made in the construction and arrangementof the parts of the adapter, for example (see Figs. 8 and the mount 7may be formed with a continuous flange 7, which may be applied to acircular socket S of the sleeve 8, and the hook-ends 9 of the dogs maybe positively seated in depressions or grooves 7 of the mount, withoutdeparting from the invention as claimed.

Having thus described m invention, what I claim, is

1. In a syringe, the combination with the barrel and a hollow needle anda needle mount having a conical socket i'acing the barrel, of an adapterfor connecting the needle-mount with the barrel comprising a hollow bodyhaving a conical tip adapted to enter the socket of the mount, a collarswivelled to said body adjacent said tip, means for interlocking theneedle-mountwith said collar, and means carried by said collar adaptedto grip the needle-mount when said mount and said collar are rotated asone part.

2. An adapter for syringes comprising a hollow body adapted totelescopically received the barrel of the syringe, said body having atapered tip, a needle-mount comprising a hollow body having a taperedsocket at one end adapted to receive said tip, a collar swivelled to theadapter beyond said tip, said collar having a socket adapted to receiveone end of the needle-mount, and means carried by the collar adapted togrip the needle1nount for preventin accidental detachment thereof.

3. In a hypodermic syringe. the combination with the barrel and aneedle-mount having an enlarged end formed with a conical socket, of anadapter for detachably connecting the needlemount with the barrel,comprising a hollow body having at one end a conical tip adapted totelescope said mount and having a flange formed with oppositely facingcam grooves. means swivelled to the said body, adapted to interlock withthe needle-mount for rotation as one part, and means carried by saidswivel member and engaging said cam-grooves adapted to grip and hold theneedlemount in the operative position.

4. In a hypodermic syringe, the combination with the barrel and theplunger, of an adapter having a socket to receive the barrel and havinga conical extension aligning axially with the barrel, said adapter beingformed medially with circumferential camportions, a sleeve-couplingrotatable on the adapter and having a recess facing said extension, aplurality of dogs pivotally supported by said coupling and engaging saidcam-portions, and a needle-mount having a tapered socket to receive saidextension and having a flattened end adapted to enter the recess of thecoupling, said mount and said coupling adapted to be rotated for causingsaid dogs to grip the opposite sides of said mount.

5. An adapter for hypodermic syringes comprising a hollow body having asocket at one end to receive the barrel of the syringe, the opposite endcomprising a tapered prolong, said adapter being formed with acircumferential flange having oppositely facing cam-sockets, asleeve-coupling swivelled to the adapter between the prolong and theflange, having oppositely facing longitudinal grooves and having atransverse socket in the end facing the prolong, a needle-mount adaptedto slip-0n said prolong and to enter said transverse socket, and a pairof dogs pivoted in the longitudinal grooves of the coupling,corresponding ends of the dogs adapted to engage said camsockets, theopposite ends of the dogs being inclined towards and adapted to grip thebody of the needle-mount when the coupling is rotated.

6. In a hypodermic syringe, the combination with the barrel and aneedle-mount, said mount being bored out at one end to receive a hollowneedle, the opposite end being formed with a tapered socket and said endbeing flattened at its opposite sides, of

an adapter interposed between the needlemount and said barrel having asocket at one end to receive the barrel, the other end comprising atapered hollow tip adapted to telescope the flattened end of said mount,said adapter being formed with circumferential cam-portions, a sleeveswivelled to the adapter between the prolate and said flange having asocket adapted to receive the flattened end of the needle-mount, andgrippers carried by said sleeve adapted to be moved into and out ofengagement with the needlemount by the rotation of the sleeve inopposite directions.

7. In a hypodermic syringe, the combination with a' barrel and aplunger, of an adapter telescopically receiving one end of the barrel,the remote end of the adapter comprising a conical tip, the medialportion of the adapter being formed with a circumferential flange havingoppositely facing cam-grooves, a collar rotatably mounted on the adapteradjacent said flange, said collar having oppositely facing longitudinalgrooves and having a transverse socket in one end, rockable gripperspivoted in the grooves and extending beyond the ends of said collar,said grippers adapted to be rocked by said cam-grooves, when the collaris rotated, and a needle-mount telescoping said conical tip, one end ofsaid mount being bored out to receive a needle, the opposite end adaptedto engage said transverse socket for rotating said collar and forrocking said grippers toward and away from the mount.

8. In a hypodermic syringe, the combination with the barrel, of a hollowadapter having a socket at one end to receive said barrel, the oppositeend comprising a tapered extension, said adapter being formed mediallywith an annular flange, said flange having oppositely facing camsockets,an annular coupling rotatably mounted on the adapter adjacent the flangeand having transverse groove facing the said extension, a needle-mounthaving one end formed with a tapered socket adapted to receive saidprolate, the other end adapted to support a hollow needle, said mountadapted to interlock with the transverse groove of the coupling forrotation as one part, and a plurality of dogs pivoted to the oppositesides of said coupling, the ends of said dogs overlapping said flangeand engaging said cam-sockets, the opposite ends of said dogsoverlapping said mount adapted when the mount and coupling are rotatedto be moved away from said cam-sockets for gripping the opposite sidesof the mount.

In testimony whereof I aflix my signature.

GEORGE E. HAINES.

